Each year, seasonal flu sickens about 1 billion people worldwide and causes approximately 290,000 to 650,000 respiratory ...

Birds rely on a mix of instincts, environmental cues and navigation mechanisms to know when and where to migrate, some of ...

Cities are strange ecosystems. For most creatures, they’re harsh, unforgiving places. But some have managed to not just ...

Birds are vertebrate animals adapted for flight. Many can also run, jump, swim, and dive. Some, like penguins, have lost the ability to fly but retained their wings. Birds are found worldwide and ...

Dinosaurs are the extinct relatives of birds that roamed the lands and seas of ancient Earth. They first appeared around 240 ...

These colors distinguish them as some of the world's most dramatic and attractive birds. Males often sport vibrant feathered ruffs or amazingly elongated feathers, which are known as wires or ...

These lessons were designed to accompany the first two parts of the PBS Life of Birds series. Although this lesson plan was developed primarily for grades 9-12, teachers of elementary or middle ...